Stitch remover



June 8 1926.

M. SAMUELIAN STITCH REMOVER Filed June 19, 1922 F/E- E'.

Patented June 8, 1926.

flssaiss a The invention' relates-:to =fdevicesforrey ymovii'igthe*stitches fromstitched rubber andvleathergoods and especiallyfro1n.the soles fof shoes prepa-ratoryj to "resolmg and simple lpartsthat can be readily-and cheaply manufactured.

My invention possesses other objects and features of advantage, some ofwhich, with the. foregoing, will be set forthin the followingdescription of the invention. It is to be understood that I d o notlimit myself to the showing made by thesaid description, as I may adoptvariantforms of the invention within the scope of the claims.

Referring to the drawings: Fig. 1 is an elevation showing my stitchVremover mounted upon a mandrel with a shoe in the position in which itis operated vupon by the stitch remover. The vshoe is'shown in section.Fig. 2 is an elevation of the stitch Y remover, the direction of viewbeing indi-V cated by the arrow 2 in Fig. 1. Fig. 3 isa similarelevation of the stitch remover taken from the opposite side.

Figure 4 is a sectional View of the stitch remover and structure onwhich it is carried.

When shoe-s are to be resoled it is the custom of the repair man toignore the'old stitches which originally held the sole and to stitch thenew sole to the welt overthe old stitches or to remove first thestitches by hand which is a slow and rather tedious procedure. By theuse of my invention, the

old stitches are withdrawn' within 'a few.

vthedrivmg'head 9 may be moved longitudinally along the shaft 4 againstthe .presseconds leaving the welt in the propercondition forattachingthe new sole.

The stitch remover of myinvention com-r prises a cylindrical block 2having an aperture 3 adapting it for mounting upon .the arbor 4 of anysuitable powerl driven machine commonly used for f mounting l thetrimmer knife. The block is provided on one edge with a seriesof teeth'Gpreferably i of the configuration shown inoFigs. l and 2, that is to sayhaving a fiat face on one side continuous with the side ofthe block andon the inside curving from the point inwardly. Such shape of tooth bestadapts the stitch remover for contact` with the stitches 7 as shown inFig. l.

f Onv the opposite end of the block, teeth 8.

are provided which are adapted to interlock with the complementarymembers on- *Appncaticnned' :une 19, '1922.'sria1N0.f569,472. Y

'1 does v' thel i' 'i of arbor. In 4other words, the vstitch remover-ismade so'that itmaybe substituted on the arbors of standard.y :machinesfori cnt-ting toolsi such as the trimmer knife. Y w

As' shown in F igs. l and 4, ay machine commonly found in shoe repairshops kconsists of an arbor 4`adapted to be rotated at Vhigh speed, andnear the end of which is slidably mounted a shield. or driving head9rprevented'from rotation on the arbor by the key 11. A spring 12inter-posed between the driving head and the bearing (not shown) inVwhich the arbor. runs, resiliently presses the driving head outwardlyagainst the tool held on the end of the arbor by the sol nut 13, theteeth 14 of the driving head ini terlocking with the complementary teethformed on the tool, suchteeth correspond- 7 y ing tothe teeth l8 on myvstitch remover.

VThe end of the arbor is commonly tapered to receive a split bushing15,'which expands f against the bore of the tool mounted on l the arbor,vso that the tool is rigidly fixed in place by tightening the nut-13.vThe structure `just. explained is quite essential when a cutting toolismounted the. arbor, butforms no part of my invention and is Vexplainedhere merely to make clear the fact that my stitch removing tool isinterchangeable with the cutting tools of standard machines. Whenl mystitch remover Vis assembled on the arbor in pla-ce of the trimmerknife, the driving'head orshield 9 v insures a non-rotative connectionbetween arbor and lstitch remover, but the fact that sure' of the spring12 is immateriah'since the functioning of the teeth 6 to remove thestitches from the sole as shown in Fig.

head. .l l Y In .operation the shoe-,lOis held in the hand with thestitch' remover revolving at high speed. "The shoeis positioned relanot`require the aid of the drivingv tive to the stitch remover as shownin'Fi'g.

1, and quickly lmoved or turned so that theteeth ofthe stitch remover.pass over the ends of the stitches exposed kon the upper part of thewelt. The teeth do not out the stitches but seize them anddraw them outso that by passing the shoe once around the stitch remover the welt isfreed from; the old stitches lleaving it in perfect condition for theapplication of the new stitches to hold a circular series of teeth ea'ohhaving` oney side lying in a `convex curve extendingin- Wardlyandaxullyriroln u circular peripheral edge, and having the advancing faceof the tooth ooineidentwith L plane parallel to the :mie of rotation andintersecting the com'v d face Vin zt non-cutting stitchfseizing edge. n

2. The Combination with a'driving arbor of a cylindrical block adaptedto be secured for rotation with said arhor and having tangentiallyextending pointed teethV therey on each of said teeth having a Convexcurved surface extending` baokwardly from Va stitch-seizing edge whichextends from the point to the base of the tooth,said Curved 4Surface of:the tooth beingsuch that its intersection with a plane perpendioulantothe exis oi: rotation of the arbor is Aa, circular are.

ln witness whereof, the above named applicant Ysind inventor hashereunto sethis hand. Y

MEGERDICH SAMUELIAN.

